CN1009629B - Distributing device for manufacture of multilayer sheets - Google Patents

Abstract

Device for distributing thermoplastic or like material introduced into a feed assembly of a die for manufacturing multi-layer sheets which is connected to at least two supplies and comprises an assembly of elements juxtaposed in such manner as to define a central channel and including at least one radial channel opening into said central channel, the device comprising, in the region of the junction of the radial channel supplying additional material introduced on the receiving material previously introduced into the central channel, a progressive regulating means disposed in each corresponding element of the feed assembly so as to instantaneously modify in the plane of superimposition of the thermoplastic materials the cross-sectional shape of the corresponding stream of additional material in the central channel so as to obtain the desired distribution of this material in the sheet at the outlet of the die.

Description

Distributing device for manufacture of multilayer sheets

The present invention relates to, by various materials are pushed simultaneously, and before they enter mould, make its combination, make the laminated plate of thermoplastic material or other material.

Simultaneously avoid allowing it mix again for above-mentioned material is combined into one, these materials are with coaxial or be in a parallel manner at least, flow into the feeding-passage of mould.Adopt coaxial tubular stream can obtain such sheet material, promptly include an internal layer and seal the skin of this internal layer with at least one.Such sheet material usually is a kind of sandwich material structure, and wherein each layer is in other words conj.or perhaps with the symmetrical arrangement with respect to internal layer with symmetric mode.

To achieve these goals, imagined the partition wall that in the materials flow passage, is provided with radially already, be convenient to separately, and be able to inject different materials in each side of internal layer with outer field materials flow.Under the other situation, then separately introduce the parallel conduits of various materials, and these materials only come in contact just in the terminal of given parallel line, thereby can avoid the danger of any turbulent flow and mixing with partition wall.

The applicant is in French Patent (FRP) FR-A-2437289, a kind of feeder that is used to make multilayer thermoplastic sheet's mould was once disclosed, it is to be connected on two thermoplastic materials extruders at least, and in wherein a collection of materials flow is converged to centre gangway that this die feeding mouth is connected in.This feeder includes by some and determines the sub-assembly that the adjacent components of this centre gangway constitutes; In the feed arrangement of this sub-assembly one end setting, be formed with, connect above-described some passages that are at least two extruders respectively, each adjacent components then comprises a radial slot of linking up with a passage of above-mentioned centre gangway and this feed arrangement at least, and this radial slot is the passage through forming on the above-mentioned parts on the materials flow downstream optionally.

Adopt above assembling mode, each parts in the formed sub-assembly of this adjacent components can in one deck of multilayer material volume or completely specified which floor the introducing mould.

Such assembling mode illustrates that every layered material stream is to arrive central authorities' material volume continuously, and this central authorities' material volume itself will be introduced in the mould at last.

Transfer to the systematicness and the uniformity of the material volume in the mould, will depend on the systematicness and the uniformity of extruder especially, depend on the relative viscosity and the size that depends on various feeding troughs and passage of used plastic material.Remove this, the profile of various passages and groove is determining to transport to its shape of cross section of materials flow of material volume in the centre gangway to a great extent.

Therefore, the shape of cross section of the various liquid streams of output material volume must select in advance by the appropriate size of determining passage and groove.

In addition, for certain material that can make the output of certain parts and extruder adapts, the radial slot of this corresponding component must change.For this reason, must before this equipment work,, carry out above-mentioned these corresponding correction operations with this distributing device dismounting.

Between operational period, can change the relative viscosity of material by the temperature of regulating the material of introducing, to revise the distribution of layers of material on adjacent charge level.

But this moment, the scope of temperature adjustment is very narrow, and this is because temperature is low excessively, exist the danger of stopping up above-mentioned annular element radial passage, and temperature is too high, may make material combustion again.Also having, along with the reaction time of each variations in temperature is also longer, thereby only use this regulating measure in operation, is to make the profile of each layer possess satisfied accurate profile in a kind of quick and easy mode.

The present invention's purpose promptly is to provide a kind of machine, the thermoplastic material that distributes and introduce, in order to feed the multiple-plate mould of a shaping, the structure of this kind distributing device is very simple, can be by the operation that is easy to carry out, in operation process, control and regulate the profile of various materials flows in this distributing device, thereby obtain suitable distribution, and in adjusting, avoid turbulent flow in discharging place of this mould.

So, the invention provides a kind of distributing device, be used for distributing the thermoplastic material of introducing in the die feeding device, and this mould is multiple-plate as making.This distributing device is to being the charging aperture that is connected to two thermoplastic materials, it includes the sub-assembly of some parts like this, the mode of adjoining that is these parts is determined a centre gangway that connects this die inlet, dispose a feed arrangement at above-mentioned sub-assembly one end of forming by some adjacent components, and in this distributing device, also be provided with the passage that is connected to said these charging apertures respectively, each such parts comprises a radial slot that feeds said centre gangway at least, link up simultaneously with one of passage of this feed arrangement, this distributing device, the bonding land of the radially feeder channel of using in the time of in additional materials being introduced the reception material of having imported in advance in the centre gangway, include the classification adjusting device that is configured in this each corresponding component of feeding sub-assembly, so that in time in the stacked plane of thermoplastic material, in this centre gangway, change the shape of cross section of corresponding additional materials flow, make and obtain the required distribution of this material in sheet material in the exit of this mould.

According to another characteristics of the present invention, above-mentioned classification adjusting device comprises: be used for the additional materials from radial slot is directed to the device of centre gangway; And the device of regulating the width of the materials flow of introducing with respect to the centre gangway width, wherein the function of back one width as following variable, the i.e. relative viscosity of the additional materials that is injected, the relative viscosity that receives material and the temperature of employed each material.

Other characteristics of the present invention and advantage are understood fully in the description that can be provided with nonrestrictive way of example by following contrast accompanying drawing, in the accompanying drawing:

Fig. 1 is the schematic diagram that is used for making the equipment of multilayer heat-stabilized wood flitch;

Fig. 2 is the perspective illustration that is equipped with the feeding sub-assembly of distributing device of the present invention;

Fig. 3 is perpendicular to the sectional view of distributing device centre gangway axis of the present invention;

Fig. 4 is the axial, cross-sectional view along IV among Fig. 3-IV line intercepting;

Fig. 5 is the schematic diagram of distributing device of the present invention on diverse location;

Fig. 6 is the schematic diagram of another embodiment of distributing device of the present invention; And

Fig. 7 is the schematic diagram of another embodiment of material feeding plug.

Show the schematic diagram of understanding the equipment of making thermoplastic material or similar material multi-layer sheet among Fig. 1, this equipment has comprised a feeding sub-assembly, and this sub-assembly is equipped with the distributing device that introducing material of the present invention is used.This equipment comprises a mold A, and its charging aperture B is connected with a feeding sub-assembly 1.This feeding sub-assembly is accepted a collection of dissimilar thermoplastic materials flow directly or by a manifold means C.In illustrated embodiment, this sub-assembly is connected on four extruder D1 to D4.

As shown in Figure 2, this feeding sub-assembly comprises four parts that adjoin, and specifically, is made up of four parts 10 to 13, and they are arranged on therewith between four parts 10 to 13 itself the coaxial feed arrangement 14 and drawing mechanism 15.

All these parts are interconnective, for example use bolt (not showing bright) to connect.

Feed arrangement 14 has four passage 14a to 14d, and they are fit to be used for being connected on the corresponding extruder D1 to D4 (Fig. 1) at upstream extremity.

Parts 10 to 13 comprise a hole placed in the middle, and a centre gangway 16 of feeding sub-assembly 13 is determined at the center of aiming at it, and this passage feeds in set in the drawing mechanism 15 central tapping channel 17, and are fit to be connected with the feed channel B of mould A.

Facing to a radial slot 18 being arranged on the face of feed arrangement 14, the passage 14C of it and feed arrangement 14 leads to parts 10, feeds simultaneously in the centre gangway 16 at it.This kind parts also comprise three axial passages 19,20,21, they be through hole and around the axis of these parts be separated by 90 ° angle separately.

Parts 11 at first have two axial passages 22 and 23, and they lead to the passage 19 and 21 of parts 10 respectively.Parts 11 also comprise the axial passage 24 of the passage 20 of an aligning parts 10, and it leads to via a radial slot 25 and the vertical channel 26 that is located in the parts 11.The stretched through top of parts 11 and communicate of this vertical channel 26 with centre gangway 16.In this vertical channel, be provided with a device 50, be used for being classified to regulating and introduce in the centre gangway 16 and from the distribution of material of radial slot 25.

Above-mentioned adjusting device 50 will be in below with reference to Fig. 3 and 4 for a more detailed description.

Parts 12 include first axial passage 27, and it correspondingly leads to the axial passage 22 and 19 of parts 11 and 10.These parts 12 also comprise the axial passage 28 of the passage 23 of aligning parts 11, and it leads to via radial slot 29 and the vertical channel 30 that is located in the parts 12.This vertical channel 30 passes through the top of parts 12 and feeds centre gangway 16.In this vertical channel, also be provided with a device 50, be used for being classified to regulating and introduce centre gangway 16 and from the distribution of material of radial slot 29.

Parts 13 have an axial passage 31, and it correspondingly leads to the axial passage 27,22 and 19 of parts 12,11 and 10.This axial passage 31 is linked up via a radial slot 32 and a vertical channel 33 that is located in the parts 13.In this vertical channel, also have a device 50, be used for being classified to regulating and introduce centre gangway 16 and from the distribution of material of radial slot 32.As for parts 13, it is last parts of feeding sub-assembly 1, so there is not other interface channel.

Each adjusting device 50 is to work in the bonding land of additional materials being introduced between centre gangway and the radial slot (25,29,32).

Referring to Fig. 3 and 4, wherein described the adjusting device that for example is placed in the parts 11 in greater detail below, other adjusting device 50 that is located in the parts 12 and 13 is then absolute therewith consistent.

In the parts shown in Fig. 3 and 4 11, feed in its centre gangway 16 vertical channel 26 with will lead to the radial slot 25 that centre gangway 16 is supplied with materials.

In above-mentioned vertical channel 26, be provided with adjusting device 50, it includes a device, this device will be input to centre gangway 16 from the material of radial slot 25 on the one hand, on the other hand also with respect to the width of this centre gangway 16, change the device of the materials flow width of introducing.

For this reason, this adjusting device 50 includes the cylinder 51 of wearing interchangeable injection wedge 52, in order to avoid move with respect to this cylinder 51 in duct 26.

One flange 52a(Fig. 4 that is the T type on axial section is arranged at top of this injection wedge 52), it is introduced among the respective groove 51a who is located in the cylinder 51, be convenient to when sub-assembly when this cylindrical shape duct 26 is withdrawn from, change above-mentioned injection wedge apace.

There is a nozzle 53 inside of this injection wedge 52, is an injection zone at its underpart end, and this injection zone is the profile of a long narrow shape, be used for introducing and the centre gangway 16 that distributes in material.This injection zone for example is to be made of the line of rabbet joint 54 with rectangular cross section.

Above-mentioned cylinder 51 has a cannelure 55, and it is communicated with 57 nozzles 53 with injection wedge 52 by two apertures 56.

Cylinder 51 for example is to be remained in its vertical channel 56 by two pins 58 and 59 with injection wedge 52, and its position makes the radial slot of feed can pass through cannelure 55, aperture 56 and 57 and nozzle 53, with centre gangway 16 communications.Pin 58 and 59 plugs together in the duct of the circular groove 60 that is located at annular element 11 and also is arranged on cylinder 51, and pin vertically locks this cylinder with cooperating of circular groove, allows it to rotate with injection wedge 52 simultaneously.

In addition, cylinder 51 includes such mechanism, that is, be used for locating when rotated, and the longitudinal axis of the line of rabbet joint 54 of injection wedge 52 is located with respect to the longitudinal axis of centre gangway 16.

For this reason, make the head of above-mentioned cylinder 51 make the form of a regulating wheel 61, its periphery 1/4th on some breach 62(Fig. 5 are arranged), be used to introduce a little pin 63, pin the sub-assembly and injection wedge 52 of cylinder 51, and live the position of the line of rabbet joint 54 surely.

As shown in Figure 5, this regulating wheel 61 has label or reference number 1 to 5 in the place ahead of its each breach 62, and among them, for example label 1, corresponding to the position of the line of rabbet joint 54 perpendicular to materials flow 51 directions of centre gangway 16; And label 5 for example, then corresponding to a position that is parallel to this materials flow direction; As for label 2 to 4, then corresponding to the centre position of this line of rabbet joint.

The rotation of above-mentioned regulating wheel 61, corresponding with breach 62, by a retainer 64(Fig. 4), be limited to 90 °.

According to another embodiment, a kind of continuous changeable mechanism can be borrowed in the angle position of the line of rabbet joint 54, realize on any one position that in desired 90 ° of scopes this mechanism for example can be the worm and wheel type, on an enough accurate vernier scale, have calibration.

In the exit of feeding sub-assembly 1, each plastic coat of being introduced moves with the speed of unanimity, and can enter mould A like this by the material volume that these layers are formed.Each layer thickness of final finished is a function of the selected load of corresponding extruder D1 to D4.Supply with the systematicness and the uniformity of the material volume of this mould, depend on the systematicness and the uniformity of these extruders especially, the relative viscosity of used plastic material, and the various grooves and the passage of feeding sub-assembly.

Therefore, viscosity according to the introducing material, the viscosity of institute's holding material and the temperature when using various material, be arranged at the adjusting device 50 in each parts 11,12 and 13, just determine and regulating the position of the line of rabbet joint 54 of these devices 50, be used for correspondingly the material of the machine of self compaction in the future D2 to D4, be incorporated into and introduced parts 10 in advance and receive on the material, thus according to desirable distribution stratification from extruder D1.

In addition,, in the various control procedures that final sheet material is done, found to have in these lamellated plates certain one deck not meet desirable distribution, can regulate the pairing adjusting device 50 of this one deck immediately, so that proofread and correct this defective if in the exit of mould A.

In fact, when this defective layer has excessive protruding profile, be that its dual-side is when thin, the position that need only change the line of rabbet joint 54 by the ratio that improves l/L is just passable, here, l represents the width of the materials flow of introducing, and L represents and its width of the corresponding centre gangway of reception materials flow (Fig. 5) of introducing in advance.

For this reason, rotate regulating wheel 61, make pin 63 in place to corresponding breach, for example at label 1 or 2 places, make the line of rabbet joint 54 be in the position shown in Fig. 5 a or the 5b thus, so just can improve the materials flow width of being introduced, thereby also just increase this material quantity that is incorporated on centre gangway 16 sides.

On the other hand, if this defect layer had recessed profile, then can change the position of the line of rabbet joint 54 by the ratio that reduces l/L.For this reason, by and last rightabout rotate regulating wheel, make pin 63 for example be located in corresponding to shown in Fig. 5 d or the 5e in label 4 ' or 5 ' breach located.On such position, the width l of the materials flow of being introduced reduces, and causes the supercentral quantity of material of centre gangway and then therefore increases.

Like this, the machine of this distribution injection material of the present invention just provides a kind of fast and effectively means in the plane of stacked thermoplastic material, be able to proofread and correct immediately in operation process also and can carry out continuous adjusting, improve the distribution precision of the material of introducing, obtained stay-in-grade product.

In addition, when this distributing device has one to change when the parameter of various materials, can change in time and regulate the result and need not dismantle this feeding sub-assembly.

At last, this distributing device can be made a large amount of adjustings and be selected, and making in two kinds of limiting cases has infinite distribution form, and turbulent flow can not take place in adjustment process.

Fig. 6 has shown another embodiment of distributing device of the present invention.In this embodiment, in the cylinder 51 of adjusting device 50, be provided with a valve 70.For this reason, an axial hole 66 is arranged on this cylinder 51, wherein be screwed into a threaded rod 71, supporting a hollow cover spare 72 in its underpart, the latter feeds in the hole 56 at cannelure 55 table top places.Borrow a turret head 73 to rotate above-mentioned threaded rod, can change the position of cover part 72 in hole 56, this just can increase or reduce the supply pressure of material to upstream side, thereby just makes the operation uniformity of extruder.

Aforementioned interchangeable injection wedge 52 can have the rectangular cross section shown in Fig. 3 to 5.

Should be understood that the line of rabbet joint 54 can change over Any shape, particularly become a kind of shape (Fig. 7), so just can obtain a kind of result of the materials flow of line of rabbet joint center less than the place's materials flow of line of rabbet joint limit portion with diabolo cross section.

Claims (6)

1, a kind of distributing device that is used for distributing interior thermoplastic material of introducing one die feeding device or similar material, this mould has as making a multiple-plate charging aperture, this distributing device is to be connected on the supply source of two thermoplastic materials or similar material at least, it is comprising the sub-assembly of some hollow parts like this, the mode of adjoining of these parts is determined a centre gangway that connects this die feeding mouth, be used for receiving thermoplastic material or similar material, dispose a feed arrangement at above-mentioned sub-assembly one end of forming by some adjacent components, and in this distributing device, also be provided with the passage that is connected to said these supply sources respectively, each such parts comprises a radial slot that feeds described centre gangway at an abutment at least, this groove is used to provide additional materials, link up simultaneously with one of corresponding passage of this feed arrangement, this distributing device is in each adjacent components, between centre gangway and radial passage, additional materials introduced the zone of using when the thermoplastic material imported in advance in the centre gangway or similar material receive in the material, abutment, include the classification adjusting device that is configured in each corresponding adjacent components of this feeding sub-assembly, so that in time in the stacked plane of material, in this centre gangway, change the shape of cross section of this corresponding additional materials flow, make and obtain the required distribution of this additional materials in sheet material in the exit of this mould, above-mentioned classification adjusting device comprises a kind of device, be used for and be delivered to centre gangway from the additional materials of radial slot, and the device of regulating the width of additional materials stream of introducing with respect to this centre gangway width, wherein the function of back one width as following variable, the i.e. relative viscosity of the additional materials of being introduced, receive the serviceability temperature of spending viscosity and this each material mutually of material, described adjusting device also includes the cylinder of wearing the injection wedge, in order to avoid it rotates with respect to this cylinder, the injection wedge defines a nozzle, this nozzle leads to said centre gangway, described cylinder has a cannelure, the aperture that is connected cannelure with some, it makes the radial slot of feeding additional material and the nozzle of the injection wedge that mentions previously leads to.

2, a kind of distributing device according to claim 1, wherein said nozzle end in an injection zone that is defined for long narrow shape profile in aforementioned centre gangway district.

3, according to a kind of distributing device of claim 2, wherein said adjusting device includes and is used for location when rotating, and the longitudinal axis of injection zone that makes described injection wedge is with respect to the device of the longitudinal axis location of this centre gangway.

4, according to a kind of distributing device of claim 3, wherein, be used for making described adjusting device mechanism fixing and gear shift to comprise a regulating wheel that is arranged on described cylinder top, and about 1/4th positions of this regulating wheel periphery are provided with many breach that are used for inserting little pin.

5, according to a kind of distributing device of claim 1, wherein, described adjusting device comprises a valve, is used for regulating the upstream pressure of the additional materials of corresponding supply, this valve comprises a case, and it feeds at least one aperture in the cannelure zone of this adjusting device cylinder.

6, a kind of drawing-in device of introducing the extrudable material in the drawing-in device that distributes, this drawing-in device has one can be connected to the discharging opening of making multiple-plate die feeding mouth, one end of this device also has a feed arrangement, described feed arrangement has two passages at least, each passage can be connected on the independent extrudable material source, and described drawing-in device also comprises the distributing device described in the claim 1 to 5.

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